Handlers and memory leaks in Android

Question

Please have a look at the code below:

public class MyGridFragment extends Fragment{

     Handler myhandler = new Handler() {
    @Override
    public void h         


        

Answer 1

I run into the same issue and I find that it is one of this topics with many questions and few answeres. My solution is simple and I hope it can help someone:

/* BEFORE */
private Handler mHandler= new Handler() {
        @Override public void handleMessage(Message msg) {
        this.doSomething();
    };
};

We can create a static Handler subclass that simply runs a Runnable. The actual handler instance will know what to do through the runnable that will have access to instance variables.

/* AFTER */
static class RunnableHandler extends Handler {
    private Runnable mRunnable;
    public RunnableHandler(Runnable runnable) { 
        mRunnable = runnable;
    }
    @Override public void handleMessage(Message msg) {
        mRunnable.run();
    };
}
private RunnableHandler mHandler = new RunnableHandler(new Runnable() {
    @Override public void run() {
        this.doSomething();
    } });

The warning is gone while the funcionality is the same.